I________up (climb) the mountain when it started to snow.
was climbing
I was sitting down a river when I_________(think) I saw a tree.
thought
I was sailing over a river when I_________(see) a boat in front of me.
saw
When I ____________(make) a cake, I________ (drop) the bowl.
was making/dropped
We___________ (work) in the garden when we found some money,
were working
I was cleaning the kitchen when she__________(arrive)
arrived
I___________(sleep) on the ground when suddenly I felt a snake.
was sleeping
I_________ (see) you when I was waiting for a bus.
saw
